Apparatus for the manufacture of hollow glassware.



P. H. THOMPSON.

APPARATUS FOR THE MANUFACTURE 0F HOLLOW GLASSWARE.

APPLICATION FILED FEB. I6, 1915.

X IV r. H. THOMPSON. APPARATUS FOR THE MANUFACTURE OF HOLLOW GLASSWARE.

APPLICATION FILED FEB. 16. IOTS.

Patented Mar. 28, 1916.

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R 0 T N E V W PAH/(E l1'. THOMPSON BY /w W HM ATTORNEYS ture of Hollow Glassware,

UNITED sTATEs PATENT oEEioE.

PARKE H. THOMPSON, 0F MILLVILLE, NEW JERSEY, ASSIGNOR T0 MILLVILLE MACHINE COMPANY, OF MILLVILLE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

APPARATUS FOR MANUFACTURE 0F HOLLOW GLASSWARE.

Patented Mar. 28, 1916.

Application led February 16,1915. Serial No. 8,447.

To all whom it may concern.'

Beit known that I, PARKE H. THOMPSON, a citizen of the United States, residing at Millville, Cumberland county, New Jersey, have invented certain new and useful Improvements in Apparatus for the Manufacof which the following is a specification.

My invention relates to apparatus for the manufacture of hollow glassware such as bottles and the like, and particularly to the' type of apparatus in which such glassware is made by the aid of suitably manipulated air under pressure or exhaustion or both; the glass being first forced into a blank mold at one level so as to form a parison and then raised to a higher level where it is expanded in a finishing mold to inal shape. In such apparatus a plunger arranged to produce an indentation in the top of the parison insures access of air to the interior of the glass and thus permits and facilitates its nal expansion.

The object of my invention is to provide apparatus as aforesaid which shall be more certain, efficient, and speedy in operation than apparatus hitherto used.

More particularly the object of my invention is'to provide improved means for positioning and removing the plunger from the top of the parison, and for applying differences of 'air pressure in expanding the glass into its final form.

My invention will be better understood by referring to the accompanying drawings in which it is shown embodied in, or as modifying, a machine of the above described type as illustrated in patent to Charles F. COX, No.V 880,482, dated February 25, 1908.

In the drawings Figures 1 and la, taken as one, is a sectional elevation, similar to Fig. 1 of the Cox patent referred to, showing my improvement, and Figs. 2 and 2, taken as one, is a sectional elevation similar to Fig. 2of the Cox patent.

In these views parts of the mechanism depicted are identical with those shown in the same figures ofthe COX patent. Except forthe particular parts embodying my improvements, as set forth below, the remaining parts of a complete machine may be (although not necessarily so) the same as those of the Cox patent as described and as illustrated in the various views therein.

mounted upon a table f2,

In the following description Fig. 1a should be considered as placed upon Fig. 1 so that the lines a-a coincide and similarly Fig. 2a should be placed upon Fig. 2 with the lines b-b coincident, the excessive height of thev mechanism making it necessary to thus break the drawing in order to make a showing on an adequate scale.v Y

Briefly, inmaking invention aboutto be described, Ireplace the cylinder A of the Cox machine, with its'piston F and attached hollow piston rod G,'the second piston J and. piston rod K with its valve cage L, valve N, and the other immediately associated pistons, sages, and associated parts having somewhat similar forms and functions but differently the embodiment of my packing glands, air cham-- bers, air passageshetc., by a cylinder'having plston rods,'air chambers, air pasarranged so as to operate differently and' bring about improved results.

In the description which follows, identi'- cal letters areused to designate parts which-f I correspond to and are (although not necessarily so) identical with parts shown in the Cox patent. y

In the drawings, a piston cylinder 1 is ment with blank mold V and inishingmold above and in aline- A S. The upper end of the cylinder is closed by a flanged cap 3 having acentral upwardly projecting extension 4- which is bored centrally so as to serve as an inner sleeve-for a second cylinder -5 which is supported upon the cylinder 1. The sleeve 4 extends nearly to the top of cylinder 5 which is closed by a plug 6 arranged to coperate with the'top of the sleeve so as to provide a packing gland 7. A similar packing gland 8 is provided near the bottom of cap 3.

Within the two cylinders 1 and-5, and a 4little longer than their combined lengths, is

a hollow piston rod 9;I its diameter is such that it has easy sliding fit in the bore of cap 3, extension 4, and plug 6 with which the upper cylinder 5 is lined. Fitted inthe lower cylinder "1 is a main piston 10, fixed upon the hollow piston rod 9, and adapted to move from one end of said cylinder to Vthe other. The lower end of cylinder 1`is closed by a plug 11 through the central bore of which the piston rod 9 is adapted to be moved. vA packing gland is provided at 12. An annular air-chamber 13 and connecting A head 19, which may be though it need f not be identical with the head1-I of the Cox patent, is bolted, or otherwise firmly held, to

the lower end of piston rod 9; lthe air .valve H of Cox is, however, unnecessary., In-

closed within hollow piston rod 9 is a second piston rod 2O tipped at its bottom by a pluna star shaped spider, or guide. 21

ger M;

keeps theplunger centered. vThe spider o r cumstances,

- flanged button 26.-

lows 4I-Ioles 27 will being guide may have any convenient shape provided only it leaves substantial passageway for air .between the two piston rods, 20 and 9.

When'the machine, in which my invention is embodied, is in idle position (Fig. 2) the plunger M lies entirely within the hollowpiston rod 9 and -just above its lower end, as shown. The length of rod 20 is such that a very considerable portion will, in these cirproject out above the top of the hollow piston rod. A piston 21 is xed upon rod 20 and a spring 22 holds the same normally against the cap which closesthe top of. hollow piston rod 9.

Mounted upon and above the two cylin ders l and 5 and in alinement therewith isa short plunger cylinder'23 through'the bot. tom of which enters a pipe 24 for the supply of compressed air; the vtop of this cylinder 1s left open tel the atmosphere and the rod 20, carrying a piston 25 slidably thereon, normally vpasses through and ,beyond it.v The extreme upper end of rod 20'is tipped by a Circumferentially disosedholes 27 through the wall of the holow pistonrod are in "registry with annular air chamber 13 when piston 10 is in its limiting upper position..

The operation of my. invention is as :toln

pipe 17, main piston 10 is forced down to parts in the position shown iny Figs. land V:1a.

chamber 15 and, the bottom of piston rod 9 closed through the blank mold V which is now inserted in the molten glass W', the interior ofthe hollow piston will be.

exhausted by applying suction to pipe 16, thereby drawing down piston 2l against the resistance of spring 22 and forcing plunger M down into neck mold I; glass will then be drawn up into the blank mold and neck mold and around the plunger.

By means fully disclosed in the Cox patent (or by other equivalent means) but not con-f stituting a part of my invention nor shown pat- ' the plunger thereby shape the finished article.

Air under pressure being admitted to now register with annular'v in the drawingsherewiththe blank mold-is' now raised through a short distance, the excess glass removed from' the bottom of the mold, and the blank*V mold opened. Air is lthen admitted to pipe 24 `thus .raising piston of said piston, also raising and withdrawin Mv from the glass blank. .The a1r pressure is then cut off from pipe 1,7 and admittedto pipe 18 below main piston 10 thus raising the hollow piston rod 9 and bringing all the parts in the position shown in Figs. 2 and 2t.u (Finishing mold S with its bottom U may mold I and the glass blank by means similar to those of the Cox 'patent).f -This raising be closed about the neckA 7O" `25 and, since button 26 lies against the top pressed air is now admitted through pipele':

and will pass into the interionof said hollow rod andzth'rough the opening leftby the.

`plun'genM in the neck of the parison'and will expand said pari'son against the bottom and the walls of-the 'finishing mold and '.lhe `linishing mold may now be opened and article removed.

In the Cox patent referred to thena'l expansionof' thebottle in the finishing mold was accomplished by applying suction on the outer side of said bottle and depending upon leakage to -supply the necessary cothe said operating air for the inside of the bottle. lIhe amount of this leakage was found to be l irregular and lvariable at different times-so that the results produced were not satisfactory. I n my improved arrangement as above described theblank is expanded into the inf ishing mold'by a positive pressure of compressed air admitted :to the interior of the blank and the amountl of pressure is of course, under perfect control. The plunger is drawn down intothe neck of the blank mold bythe same suction and -part of the same operation which draws the charge of glass into said mold. By my improvement the valve cage on the lower end of piston'rod K of the Cox patent has been eliminated-` Iclaim: -v 1. In 'apparatus of the'classdescribed, a hollow piston rod having an opening in the wall 'thereof,'ar piston fixed to said hollow rod, 'a cylinder for said .piston having'openings for admitting air above and b elow said piston, a rod extending through said hollow piston rod, a plunger at the lower end of.`

said last named rod, a piston'on said last named rod within said hollow piston rod and means for applying either pressure or exhaust to the outer end of the opening 1n the hollow piston rod.

2. In apparatus of the class described, a

piston cylinder having openings at top and bottom forthe admission of air, a `piston adapted `to be moved from one end tothe other of said cylinder, a hollow piston rod to which said piston is attached, the lower end of said piston rod being adapted to carry a neck mold and the upper end extend'- ing beyond the piston, a second cylinder mounted upon the piston cylinder and having an air chamber at the top and a vacuum chamber at the bottom thereof, an opening through the wall of said hollow piston adapted to register with the air chamber or with the vacuum chamber according as the piston is at the top or at the bottom of its stroke, a piston rod within said hollow rod, a plunger at the bottom of said piston rod and a piston upon the upper part of said rod just within the end of the hollow piston.

3. In apparatus of the class described, a piston cylinder having openings at top and bottom for the admission ofair, a piston adapted to be moved from one end to the otherof said cylinder, a hollow piston rod to which said piston is attached, the lower end of said piston rod being-adapted to carry a neckI mold and the upper end extending beyond the piston, a second cylinder mounted upon the piston cylinder and having an air chamber at the top and a vacuum chamber at the bottom thereof, an opening through the wall of said hollow piston adapted to register with the air chamber or with the vacuum chamber'according as the piston is at the top or at the bottom of its stroke, a piston rod Within said hollow rod, a plunger at the bottom of saidpiston rod, and means for applying force to the top of said last named piston for raising said plunger.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing witnesses. p

. PARKE H. THOMPSON.

Witnesses: y

THOMAS VVHITAKER, MARY M. TULLER. 

